Visual inspection machine and inspection method for appearance of current sensor

Abstract

The invention relates to the technical field of appearance detection devices, in particular to a current sensor appearance visual detection machine and method, and the machine comprises a machine table which is provided with a mounting surface, and the mounting surface is provided with a lifting notch; the measuring table is used for placing a current sensor to be measured and is movably arranged in the lifting notch along a Z-axis direction perpendicular to the mounting surface, and the measuring table has a first height and a second height along the Z-axis direction; the image shooting device is arranged over against the current sensor to be measured on the measuring table; and the positioning device is used for positioning the current sensor to be measured at a position to be measured on the measuring table, the positioning device comprises four positioning assemblies, and the four positioning assemblies are arranged on the periphery of the measuring table. According to the invention, the positioning device for positioning the to-be-detected current sensor at the to-be-detected position on the measuring table is arranged, so that the to-be-detected current sensors with different sizes can be positioned and detected.

Description

Technical Field

[0001] The present invention relates to the technical field of appearance inspection devices, and in particular to a current sensor appearance visual inspection machine and inspection method. Background Art

[0002] In the subsequent stages of current sensor production, visual inspection machines are often used to replace the human eye in measuring the appearance quality of workpieces and screening out substandard products. Visual inspection machines primarily use a visual camera (CMOS or CCD) to capture the target product, convert it into an image signal, and transmit it to an image processing system to obtain morphological information. The image system then calculates the signal to extract target features and controls the operation of on-site equipment based on the judgment results to eliminate substandard products. To improve image quality, the test piece must be precisely placed at the test location. Currently, traditional visual inspection machines rely primarily on manual positioning of the test piece, which suffers from low positioning accuracy. While some methods can improve positioning accuracy, such as providing a groove that matches the test piece's shape at the test location and uses the groove to position the test piece, this method is feasible. However, due to the fixed size of the groove, it is difficult to accurately position test pieces of different sizes. To address these issues, the present invention proposes a visual inspection machine and inspection method for current sensor appearance. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a current sensor appearance visual inspection machine and inspection method. The current sensor appearance visual inspection machine can locate current sensors to be tested of different sizes.

[0004] In order to achieve the above object, according to one aspect of the present invention, a current sensor appearance visual inspection machine is provided, comprising: The machine platform has a mounting surface with a lifting notch provided on the mounting surface; a measuring platform for placing the current sensor to be measured and movably disposed in the lifting slot along a Z-axis direction perpendicular to the mounting surface, the measuring platform having a first height and a second height along the Z-axis direction; an image capturing device, arranged facing the current sensor to be measured on the measuring platform; and The positioning device is used for positioning the current sensor to be tested on the measuring table at a position to be tested, and comprises four positioning assemblies arranged around the measuring table. Each positioning assembly comprises an elastic band and a positioning piece. The first end of the elastic band is fixed to the measuring table, and the second end of the elastic band is fixed to the mounting surface of the machine table. The positioning piece is fixed between the first end and the second end of the elastic band, and can move towards the current sensor to be tested when the measuring table moves from the first height to the second height.

[0005] Optionally, the four positioning assemblies comprise two X-axis positioning assemblies arranged opposite to each other along an X-axis direction and two Y-axis positioning assemblies arranged opposite to each other along a Y-axis direction. The X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other. The machine table is provided with two discharge ports arranged along the X-axis direction and corresponding to the positions of the two X-axis positioning assemblies, respectively. The current sensor appearance visual detection machine further comprises a locking mechanism. The locking mechanism selectively locks the positioning pieces of the two Y-axis positioning assemblies and the positioning piece of any of the two X-axis positioning assemblies on the machine table, so as to restrict or allow the positioning pieces of the two Y-axis positioning assemblies to move along the Y-axis relative to the machine table and the positioning piece of the selected X-axis positioning assembly to move along the X-axis direction relative to the machine table.

[0006] Optionally, the positioning piece of the X-axis positioning assembly comprises a fixed part and a folding part. The fixed part is fixed to the elastic band. The locking mechanism selectively locks the fixed part of the positioning piece on the machine table. The side of the fixed part facing the measuring table is foldably connected to the folding part. The folding part is elastically provided with a locking pin. The fixed part is provided with a locking hole matched with the locking pin. Each X-axis positioning assembly further comprises a pushing piece fixed to the first end of the elastic band. In the X-axis positioning assembly whose positioning piece is locked by the fixed part of the locking mechanism, the pushing piece can push the locking pin out of the locking hole when the measuring table moves from the first height to the second height, and make the folding part of the positioning piece turn in a direction away from the discharge port. Optionally, the locking mechanism comprises a limiting frame and a rotating driving piece driving the limiting frame to rotate. The limiting frame has two first limiting parts arranged opposite to each other along the X-axis direction and two second limiting parts arranged opposite to each other along the Y-axis direction. The positioning piece of the two X-axis positioning assemblies is provided with a first limiting matching part matched with the two first limiting parts. The positioning piece of the two Y-axis positioning assemblies is provided with a second limiting matching part matched with the two second limiting parts. When the positioning piece of the X-axis positioning assembly comprises the fixed part and the folding part, the first limiting matching part is arranged on the fixed part.

[0007] Optionally, when the positioning member of the X-axis positioning assembly comprises the fixed portion and the folding portion, the limiting frame further comprises a folding limiting portion for limiting the maximum folding angle of the folding portion of the positioning member.

[0008] Optionally, two storage boxes are arranged on the machine table, and the two storage boxes are arranged at positions corresponding to the two discharge ports, respectively.

[0009] Optionally, a rolling member is arranged at one end of the positioning member close to the measuring table, so as to reduce the friction between the positioning member and the current sensor to be measured.

[0010] Optionally, a positioning seat is fixedly arranged on the machine table, and a positioning shaft is fixedly arranged on the positioning member, and the positioning member is moved towards or away from the current sensor to be measured through the positioning cooperation between the positioning shaft and the positioning seat.

[0011] Optionally, the measuring table comprises an upper table body and a lower table body arranged along the Z-axis direction and a support frame connected between the upper table body and the lower table body, and the image capturing device comprises a first camera and a second camera arranged along the Z-axis direction, wherein the upper table body is made of transparent or semi-transparent material, the first camera and the second camera are located on two sides of the upper table body, and the second camera is mounted on the lower table body.

[0012] According to another aspect of the present application, a detection method for detecting the appearance of a current sensor by using the appearance visual detection machine for current sensor is provided, and the detection method comprises the following steps: S100: placing the measuring table at a first height position and placing the current sensor to be measured on the measuring table; S200: manually adjusting the position of the current sensor to be measured to be at the measurement position as much as possible; S300: moving the measuring table from the first height position to a second height position, and precisely positioning the current sensor to be measured to the measurement position by the positioning members of the four positioning assemblies; S400: moving the measuring table from the second height position back to the first height position; S500: capturing and detecting the current sensor on the measuring table by using the image capturing device; S600: moving the detected current sensor away from the measuring table and replacing the current sensor to be measured for detection.

[0013] Compared with the prior art, the present application provides an appearance visual detection machine for current sensor and a detection method, and has the following beneficial effects: 1. The positioning device for positioning the to-be-measured current sensor on the to-be-measured position of the measuring table can position current sensors of different sizes, solving the problem that the traditional visual inspection machine cannot accurately position to-be-measured parts of different sizes by using the groove positioning mode. 2. The four positioning assemblies can not only realize the positioning function of the to-be-measured current sensor, but also can cooperate with the locking mechanism to realize the classification function of the measured current sensor. 3. The mutual cooperation of the fixing part, the folding part, the locking pin, the locking hole, and the pushing piece can reduce the shielding of the other X-axis positioning assembly on the discharge port when the positioning piece of one X-axis positioning assembly pushes the current sensor into the corresponding discharge port, ensuring that the current sensor can smoothly fall into the discharge port and avoiding the damage of the current sensor. 4. The locking mechanism includes a limiting frame and a rotating driving piece, which are used in cooperation with the first limiting part and the second limiting part of the limiting frame, the first limiting matching part of the positioning piece of the X-axis positioning assembly, the second limiting matching part of the positioning piece of the Y-axis positioning assembly, and the rotating driving piece, so as to selectively lock the positioning pieces of the two Y-axis positioning assemblies and the positioning piece of any one X-axis positioning assembly on the machine table. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present application. Figure 2 It is a schematic diagram of the front view structure of the present application. Figure 3 It is a schematic diagram of the positioning device, measuring table and driving equipment structure of the present application. Figure 4 It is a schematic diagram of the X-axis positioning assembly structure of the present application. Figure 5 It is a schematic diagram of the A part of the present application. Figure 4 Figure 6 It is a schematic diagram of the locking mechanism structure of the present application. Figure 7 It is a schematic diagram of the machine table structure of the present application.

[0015] ​In the figure: 100, machine platform; 110, mounting surface; 120, lifting slot; 130, discharge port; 140, positioning seat; 150, friction reduction structure; 200, measuring table; 210, upper platform; 220, lower platform; 230, support frame; 240, driving device; 300, current sensor; 400, X-axis positioning assembly; 410, Y-axis positioning assembly; 420, elastic band; 421, first end; 422, second end; 430, positioning member; 431, fixed part; 432, folding part; 433, locking pin; 434, return spring; 435, locking hole; 436, first limiting fitting part; 437, second limiting fitting part; 438, rolling element; 439, positioning shaft; 440, pushing element; 500, locking mechanism; 510, limiting frame; 511, first limiting part; 512, second limiting part; 513, flip limiting part; 520, rotating drive member; 600, storage box; 700, first camera; 710, second camera. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example: See Figures 1 to 7 According to one aspect of an embodiment of the present invention, a current sensor appearance visual inspection machine is provided, including: a machine platform 100, which has a mounting surface 110, and the mounting surface 110 is the top surface of the machine platform 100. A lifting slot 120 is provided on the mounting surface 110, and the lifting slot 120 can be arranged on the top surface of the machine platform 100 in a slotted manner; a measuring platform 200, which is used to place the current sensor 300 to be measured, and is movably arranged in the lifting slot 120 along a Z-axis direction perpendicular to the mounting surface 110. The measuring platform 200 has a first height and a second height along the Z-axis direction. Specifically, the movement of the measuring platform 200 along the Z-axis direction can be achieved manually or by a driving device 240. The driving device 240 can be a cylinder, a hydraulic cylinder or an electric push rod. Figure 1In the embodiment, the Z-axis is the up-down direction, the first height is higher than the second height, and the first height and the second height are positions of the measuring table 200 relative to the machine table 100; an image taking device is arranged opposite the current sensor 300 to be measured on the measuring table 200, and the image taking device can adopt an existing visual camera, and the main function is to take pictures of the appearance defects of the current sensor 300 to be measured; and a positioning device is used to position the current sensor 300 to be measured at a position to be measured on the measuring table 200, and the positioning device includes four positioning assemblies arranged around the measuring table 200, wherein each positioning assembly includes an elastic band 420 and a positioning piece 430, a first end 421 of the elastic band 420 is fixed to the measuring table 200, and a second end 422 of the elastic band 420 is fixed to the mounting surface 110 of the machine table 100; the positioning piece 430 is fixed between the first end 421 and the second end 422 of the elastic band 420, and the positioning piece 430 can move towards the current sensor 300 to be measured when the measuring table 200 moves from the first height to the second height. The elastic band 420 can be a spring or a rubber band. In the embodiment, the elastic band 420 is a flat rubber band, and the fixing modes between the elastic band 420 and the measuring table 200, between the elastic band 420 and the mounting surface 110, and between the positioning piece 430 and the elastic band 420 include but are not limited to bolt connection.

[0018] The current sensor appearance visual detection machine with the above structure is used as follows: first, the measuring table 200 is placed at the first height position, the current sensor 300 to be measured is placed on the measuring table 200, and the position of the current sensor 300 to be measured is manually adjusted to be as close to the position to be measured as possible; then, the measuring table 200 is moved from the first height position to the second height position, during which the part between the first end 421 and the second end 422 of the elastic band 420 is elongated, with the elongation of the elastic band 420, the positioning pieces 430 of the four positioning assemblies simultaneously move towards the measuring table 200 until the current sensor 300 to be measured is clamped by the four positioning pieces 430, at this time, the position of the current sensor 300 to be measured is closer to the position to be measured, thereby achieving the purpose of accurately positioning the current sensor 300 to be measured. In this way, different sizes of the current sensor 300 to be measured can be positioned, and the problem that the traditional visual detection machine cannot accurately position different sizes of the measured parts by using the groove positioning mode is solved.

[0019] It should be noted that when positioning the current sensor 300 of different sizes, the moving distance of the measuring table 200 from the first height position to the second height position should be different when the first height position is fixed, so as to avoid the transition of the positioning member 430 extruding the current sensor 300 and causing damage to the current sensor 300. Specifically, when the size of the current sensor 300 is smaller, the moving distance of the measuring table 200 from the first height position to the second height position is larger, and when the size of the current sensor 300 is larger, the moving distance of the measuring table 200 from the first height position to the second height position is smaller. That is, when the first height position is fixed, the second height position is not fixed, and the second height position can be adaptively adjusted according to the size of the current sensor 300.

[0020] As shown in Figure 1 and Figure 2 In some embodiments, the four positioning assemblies include two X-axis positioning assemblies 400 arranged in opposite directions along the X-axis direction and two Y-axis positioning assemblies 410 arranged in opposite directions along the Y-axis direction, the X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other, and the machine table 100 is provided with two discharge ports 130 corresponding to the positions of the two X-axis positioning assemblies 400 arranged along the X-axis direction, as shown in Figure 1As shown, the left-right direction of the machine table 100 can be defined as the X-axis direction, and the front-rear direction of the machine table 100 can be defined as the Y-axis direction. The two X-axis positioning assemblies 400 include a left X-axis positioning assembly 400 located on the left side of the machine table 100 and a right X-axis positioning assembly 400 located on the right side of the machine table 100. The two discharge ports 130 include a left discharge port 130 located on the left side of the machine table 100 and a right discharge port 130 located on the right side of the machine table 100. The two discharge ports 130 can be part of the lifting groove 120 or can be independently arranged from the lifting groove 120. It should be noted that the arrangement of the elastic belt 420 needs to avoid the discharge port 130. Therefore, in this example, the elastic belt 420 of each X-axis positioning assembly 400 is two, the positioning member 430 is fixed between the two elastic belts 420, a gap is formed between the two elastic belts 420, and the discharge port 130 is arranged at the gap position of the two elastic belts 420. In this way, the elastic belt 420 will not block the discharge port 130, and the elastic belt 420 will not exert force on one side of the measurement table 200. The current sensor 300 appearance visual detection machine further comprises a locking mechanism 500. The locking mechanism 500 selectively locks the positioning members 430 of the two Y-axis positioning assemblies 410 and the positioning member 430 in the selected X-axis positioning assembly 400 on the machine table 100 at the same time, so as to limit or allow the positioning members 430 of the two Y-axis positioning assemblies 410 to move along the Y-axis relative to the machine table 100 and the positioning member 430 in the selected X-axis positioning assembly 400 to move along the X-axis direction relative to the machine table 100. Through the cooperation between the locking mechanism 500 and the four positioning assemblies, the current sensor 300 can be classified according to the appearance detection result. Specifically, after the image taking device takes a picture of the current sensor 300 to be detected on the measurement table 200, the detection result can be divided into qualified and unqualified. When the detection result is qualified, the positioning members 430 of the two Y-axis positioning assemblies 410 and the positioning member 430 of the left X-axis positioning assembly 400 can be locked on the machine table 100 by the locking mechanism 500, and then the measurement table 200 can be moved from the first height position to the second height position. At this time, the positioning members 430 of the two Y-axis positioning assemblies 410 and the positioning member 430 of the left X-axis positioning assembly 400 will be limited to move to the right side, while the positioning member 430 of the right X-axis positioning assembly 400 can normally move to the left side. The normally moving positioning member 430 will push the current sensor 300 with a qualified detection result into the left discharge port 130. Similarly, when the detection result is unqualified, the locking mechanism 500 will limit the movement of the positioning members 430 of the two Y-axis positioning assemblies 410 and the positioning member 430 of the right X-axis positioning assembly 400, and the current sensor 300 will be pushed into the right discharge port 130 by the positioning member 430 of the left X-axis positioning assembly 400.That is, through the cooperation of the four positioning assemblies, not only the positioning function of the current sensor 300 to be measured can be realized, but also the four positioning assemblies can cooperate with the locking mechanism 500 to realize the classification function of the measured current sensor 300.

[0021] In the above embodiment, when the positioning piece 430 of one of the X-axis positioning assemblies 400 pushes the current sensor 300 into the corresponding discharge port 130, the positioning piece 430 of the other X-axis positioning assembly 400 will at least partially block the discharge port 130, which may cause unnecessary collision between the current sensor 300 and the positioning piece 430 when the current sensor 300 passes through the discharge port 130, resulting in that the current sensor 300 may not accurately fall into the discharge port 130, and the current sensor 300 may be damaged. Therefore, as shown in FIG. 6, the positioning piece 430 of the X-axis positioning assembly 400 is provided with a positioning piece cover 440. Figure 4 and Figure 5As shown, in some embodiments, the positioning member 430 of the X-axis positioning assembly 400 includes a fixed portion 431 and a folding portion 432, the fixed portion 431 is fixed on the elastic band 420, the locking mechanism 500 selectively locks the fixed portion 431 of the positioning member 430 on the machine table 100, the folding portion 432 is connected to the fixed portion 431 by folding, the folding portion 432 is elastically provided with a locking pin 433, specifically, the folding portion 432 is provided with a mounting hole for mounting the locking pin 433, the locking pin 433 is elastically connected to the mounting hole through a return spring 434, the fixed portion 431 is provided with a lock hole 435 matched with the locking pin 433; each X-axis positioning assembly 400 further includes a pushing member 440 fixed with the first end 421 of the elastic band 420, the pushing member 440 can be fixed on the elastic band 420 by adhesion or bolt connection, in the X-axis positioning assembly 400 in which the positioning member 430 of the fixed portion 431 is locked by the locking mechanism 500, the pushing member 440 can push the locking pin 433 out of the lock hole 435 when the measuring table 200 moves from the first height to the second height, and make the folding portion 432 of the positioning member 430 turn in the direction away from the discharge port 130. Through the cooperation of the fixed portion 431, the folding portion 432, the locking pin 433, the lock hole 435, the pushing member 440 and the like, when the positioning member 430 of one of the X-axis positioning assemblies 400 pushes the current sensor 300 into the corresponding discharge port 130, the positioning member 430 of the other X-axis positioning assembly 400 can reduce the shielding of the discharge port 130, ensure that the current sensor 300 can smoothly fall into the discharge port 130, and avoid that the current sensor 300 is damaged. Specifically, for example, when the positioning member 430 of the left X-axis positioning assembly 400 pushes the current sensor 300 into the right discharge port 130, as the measuring table 200 moves from the first height to the second height, the elastic band 420 of the right X-axis positioning assembly 400 drives the pushing member 440 on the first end 421 of the elastic band 420 to move to the left, the moving pushing member 440 pushes the locking pin 433 on the positioning member 430 of the right X-axis positioning assembly 400 to move to the left, so that the locking pin 433 moves out of the lock hole 435, after the locking pin 433 moves out of the lock hole 435, the pushing member 440 continues to apply a leftward force to the locking pin 433, under the action of the force, the pushing member 440 finally pushes the folding portion 432 of the positioning member 430 to turn in the direction away from the discharge port 130, thereby reducing the shielding of the discharge port 130 by the positioning member 430, so that the positioning member 430 of the left X-axis positioning assembly 400 can smoothly push the current sensor 300 into the right discharge port 130.

[0022] It should be noted that when the positioning pieces 430 of the two X-axis positioning assemblies 400 (i.e. the left X-axis positioning assembly 400 and the right X-axis positioning assembly 400) are not locked by the locking mechanism 500, the pushing pieces 440 on the elastic belts 420 of the two X-axis positioning assemblies 400 move by the same distance along the X-axis direction during the movement of the measuring table 200 from the first height to the second height, and the positioning pieces 430 will not contact the locking pins 433, nor will the pushing pieces 440 push the locking pins 433 out of the locking holes 435 and make the folding portions 432 of the positioning pieces 430 flip away from the discharge port 130. When the locking mechanism 500 locks the positioning piece 430 of one X-axis positioning assembly 400, the distance that the pushing piece 440 on the elastic belt 420 of the locked X-axis positioning assembly 400 moves along the X-axis direction during the movement of the measuring table 200 from the first height to the second height will increase, and at this time, the pushing piece 440 on the elastic belt 420 of the X-axis positioning assembly 400 can push the locking pin 433 out of the locking hole 435 and make the folding portion 432 of the positioning piece 430 flip away from the discharge port 130.

[0023] As Figure 1 , Figure 2 and Figure 6As shown, in some embodiments, the locking mechanism 500 comprises a limiting frame 510 and a rotary driving member 520 for driving the limiting frame 510 to rotate, the limiting frame 510 has two first limiting portions 511 arranged oppositely in the X-axis direction and two second limiting portions 512 arranged oppositely in the Y-axis direction, the positioning member 430 of the two X-axis positioning assemblies 400 has a first limiting matching portion 436 matched with the two first limiting portions 511, and the positioning member 430 of the two Y-axis positioning assemblies 410 has a second limiting matching portion 437 matched with the two second limiting portions 512; wherein, when the positioning member 430 of the X-axis positioning assembly 400 comprises a fixed portion 431 and a folding portion 432, the first limiting matching portion 436 is arranged on the fixed portion 431. In this embodiment, the rotary driving member 520 for driving the limiting frame 510 to rotate can be a motor or a rotary cylinder fixedly installed on the machine table 100, the limiting frame 510 is a square frame structure, and the measuring table 200 is located inside the frame. This arrangement can facilitate the taking and placing of the current sensor 300 on the measuring table 200, the two first limiting portions 511 are two side edges of the left and right sides of the square frame, the two second limiting portions 512 are two side edges of the front and back sides of the square frame, the first limiting matching portion 436 is a protrusion protruding from the positioning member 430 of the X-axis positioning assembly 400 in the Z-axis direction, and the second limiting matching portion 437 is composed of two rods arranged on the left and right sides of the positioning member 430 of the Y-axis positioning assembly 410, one end of the rod is fixed with the positioning member 430 of the Y-axis positioning assembly 410, and the other end of the rod is bent towards the limiting frame 510 after extending a certain distance in the X-axis direction. It can be understood that the limiting frame 510 has three states under the driving of the rotary driving member 520, and the three states are respectively a horizontal state, a right-tilting state and a left-tilting state. When the limiting frame 510 is in the horizontal state, the limiting frame 510 has no limiting effect on the movement of the positioning members 430 of the four positioning assemblies, and the four positioning assemblies can move synchronously towards the measuring table 200. In this case, the four positioning assemblies can be used to position the current sensor 300 to be measured on the measuring table 200. When the limiting frame 510 is in the right-tilting state, the first limiting portion 511 on the right side of the limiting frame 510 will block the first limiting matching portion 436 of the positioning member 430 of the right X-axis positioning assembly 400, limiting the movement of the positioning member 430 of the right X-axis positioning assembly 400 towards the measuring table 200, and at the same time, the two second limiting portions 512 on the limiting frame 510 will also block the rods on the right side of the second limiting matching portion 437 of the positioning member 430 of the two Y-axis positioning assemblies 410, limiting the movement of the positioning member 430 of the two Y-axis positioning assemblies 410 towards the measuring table 200. In this case, the positioning member 430 of the left X-axis positioning assembly 400 can be used to push the current sensor 300 detected on the measuring table 200 into the right discharge port 130.When the limiting frame 510 is in the left tilting state, the first limiting part 511 on the left side of the limiting frame 510 will block the first limiting matching part 436 of the positioning piece 430 of the left X-axis positioning assembly 400, limiting the movement of the positioning piece 430 of the left X-axis positioning assembly 400 towards the direction close to the measuring table 200, at the same time, the two second limiting parts 512 on the limiting frame 510 will also block the second limiting matching parts 437 of the positioning pieces 430 of the two Y-axis positioning assemblies 410, respectively, limiting the movement of the positioning pieces 430 of the two Y-axis positioning assemblies 410 towards the direction close to the measuring table 200, in this case, the positioning piece 430 of the right X-axis positioning assembly 400 can be used to push the detected current sensor 300 on the measuring table 200 into the left discharge port 130. In other embodiments, the limiting frame 510 can also be a circular frame or an elliptical frame.

[0024] As shown in Figure 6 some embodiments, when the positioning piece 430 of the X-axis positioning assembly 400 includes a fixed part 431 and a folding part 432, the limiting frame 510 also has a folding limiting part 513 for limiting the maximum folding angle of the folding part 432 of the positioning piece 430. If the positioning piece 430 of the X-axis positioning assembly 400 performs the positioning function, the angle of the folding part 432 relative to the fixed part 431 is defined as 0°, then the maximum folding angle of the folding part 432 of the positioning piece 430 is limited within 90°, which ensures that the folded part 432 after folding can reset to the angle before folding under its own gravity. That is, through the setting of the folding limiting part 513, the phenomenon that the folding part 432 cannot automatically reset after folding can be avoided. Of course, the folding limiting part 513 is not necessary, instead, a folding connecting part with a reset function can be used to connect the fixed part 431 and the folding part 432, such as a spring hinge.

[0025] As shown in Figure 1 and Figure 2 some embodiments, two storage boxes 600 are arranged on the machine table 100, and the two storage boxes 600 are arranged at positions corresponding to the two discharge ports 130, respectively. The current sensors 300 falling into the two discharge ports 130 can be collected by the two storage boxes 600, respectively, and then transferred to other processes, such as a rework process for appearance unqualified, or a packaging process for appearance qualified. Alternatively, a transmission belt can be arranged below each of the two discharge ports 130, and the current sensors 300 classified by appearance can be transmitted to other processes through the transmission belt.

[0026] As shown in Figure 4As shown, in some embodiments, a rolling element 438 is provided at one end of the positioning member 430 near the measuring platform 200 to reduce friction between the positioning member 430 and the current sensor 300 under test. Compared to sliding contact, this can effectively reduce contact wear between the positioning member 430 and the current sensor 300 under test. In one embodiment, the rolling element 438 is a shaft that can roll along the Z-axis. In another embodiment, the rolling element 438 is a ball that can roll in any direction.

[0027] like Figure 1 and Figure 4 As shown, in some embodiments, a positioning seat 140 is fixedly provided on the machine 100, and a positioning shaft 439 is fixedly provided on the positioning member 430. The positioning member 430 moves toward or away from the current sensor 300 to be measured through the positioning cooperation between the positioning shaft 439 and the positioning seat 140. Specifically in this example, the positioning member 430 is a rod-shaped structure, and the positioning member 430 is movably provided through the positioning seat 140. It can be understood that for the X-axis positioning assembly 400, the positioning cooperation between the positioning shaft 439 and the positioning seat 140 can limit the swing of the positioning member 430 of the X-axis positioning assembly 400 in the Y-axis and Z-axis directions, so that the positioning member 430 of the X-axis positioning assembly 400 can move more stably along the X-axis direction. For the Y-axis positioning assembly 410, the positioning cooperation between the positioning shaft 439 and the positioning seat 140 can limit the swing of the positioning member 430 of the Y-axis positioning assembly 410 in the X-axis and Z-axis directions, so that the positioning member 430 of the Y-axis positioning assembly 410 can move more stably along the Y-axis direction.

[0028] like Figure 3 As shown, in some embodiments, the measuring platform 200 includes an upper platform 210 and a lower platform 220 arranged along the Z-axis, and a support frame 230 connected between the upper platform 210 and the lower platform 220. The image capture device includes a first camera 700 and a second camera 710 arranged along the Z-axis. The upper platform 210 is made of a transparent or translucent material, and the first camera 700 and the second camera 710 are located on either side of the upper platform 210, while the second camera 710 is mounted on the lower platform 220. Specifically, in this embodiment, the upper platform 210 may be made of transparent glass. A ring-shaped fill light is provided around the periphery of each of the first camera 700 and the second camera 710 to reduce interference from external light. This arrangement allows the first camera 700 and the second camera 710 to capture and test the current sensor 300 on the measuring platform 200 from two different directions, allowing for comprehensive testing without turning the measuring platform 200 over.

[0029] like Figure 7As shown, in some embodiments, the lifting groove 120 is provided with a friction reducing structure 150 corresponding to the position of the elastic band 420 of each positioning assembly, which is a shaft that can roll along the Z axis or a ball that can roll in any direction. Through the friction reducing structure 150, the friction between the elastic band 420 and the inner wall of the lifting groove 120 can be reduced, and the service life of the elastic band 420 can be prolonged.

[0030] According to another aspect of the embodiments of the present application, a detection method for detecting the appearance of the current sensor 300 using the appearance visual detection machine is provided, which comprises the following steps: S100: Let the measuring table 200 be at a first height position, and place the current sensor 300 to be detected on the measuring table 200; S200: Manually adjust the position of the current sensor 300 to be detected to be at the position to be detected as much as possible; S300: Move the measuring table 200 from the first height position to a second height position, and use the positioning member 430 of the four positioning assemblies to accurately position the current sensor 300 to be detected to the position to be detected; S400: Move the measuring table 200 from the second height position back to the first height position; S500: Use the image taking device to take a picture of the current sensor 300 on the measuring table 200 for detection; S600: Move the current sensor 300 that has been detected away from the measuring table 200, and replace it with another current sensor 300 to be detected.

[0031] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A current sensor appearance visual inspection machine, characterized in that: include: A machine platform (100) having a mounting surface (110) with a lifting notch (120) provided on the mounting surface (110); a measuring platform (200) for placing a current sensor (300) to be measured and movably arranged in the lifting slot (120) along a Z-axis direction perpendicular to the mounting surface (110); the measuring platform (200) has a first height and a second height along the Z-axis direction; an image capturing device, arranged facing the current sensor (300) to be measured on the measuring platform (200); as well as A positioning device is provided for positioning the current sensor (300) to be measured at a position to be measured on the measuring platform (200), the positioning device comprising four positioning components, the four positioning components being arranged around the measuring platform (200), wherein each positioning component comprises an elastic band (420) and a positioning member (430), the first end (421) of the elastic band (420) being fixed to the measuring platform (200), and the second end (422) of the elastic band (420) being fixed to the mounting surface (110) of the machine platform (100); the positioning member (430) being fixed between the first end (421) and the second end (422) of the elastic band (420), and the positioning member (430) being capable of moving toward the current sensor (300) to be measured when the measuring platform (200) moves from the first height to the second height.

2. The current sensor appearance visual inspection machine according to claim 1, characterized in that: The four positioning components include two X-axis positioning components (400) arranged oppositely along the X-axis direction and two Y-axis positioning components (410) arranged oppositely along the Y-axis direction, the X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other, and the machine (100) is provided with two discharge ports (130) arranged along the X-axis direction and corresponding to the positions of the two X-axis positioning components (400) respectively; the current sensor (300) appearance visual inspection machine also includes a locking mechanism (500), the lock The fixing mechanism (500) selectively locks the positioning members (430) of the two Y-axis positioning assemblies (410) and the positioning member (430) in any one of the X-axis positioning assemblies (400) on the machine platform (100) at the same time, so as to restrict or allow the positioning members (430) of the two Y-axis positioning assemblies (410) to move along the Y-axis relative to the machine platform (100) and the positioning member (430) in the selected X-axis positioning assembly (400) to move along the X-axis relative to the machine platform (100).

3. The current sensor appearance visual inspection machine according to claim 2, characterized in that: The positioning member (430) of the X-axis positioning assembly (400) includes a fixed portion (431) and a folding portion (432), wherein the fixed portion (431) is fixed to the elastic band (420), and the locking mechanism (500) selectively locks the fixed portion (431) of the positioning member (430) to the machine platform (100), wherein the fixed portion (431) is folded on one side facing the measuring platform (200) and connected to the folding portion (432), and a locking pin (433) is elastically provided on the folding portion (432), and a locking pin (433) is provided on the fixed portion (431) to engage with the locking pin (433). ) locking hole (435) for locking engagement; each of the X-axis positioning assemblies (400) further comprises a pusher (440) fixed to the first end (421) of the elastic band (420); in the X-axis positioning assembly (400) of the positioning member (430) whose fixed portion (431) is locked by the locking mechanism (500), the pusher (440) is capable of pushing the locking pin (433) out of the locking hole (435) when the measuring platform (200) moves from the first height to the second height, and causing the folded portion (432) of the positioning member (430) to flip in a direction away from the discharge port (130).

4. The current sensor appearance visual inspection machine according to claim 2 or 3, characterized in that: The locking mechanism (500) includes a limiting frame (510) and a rotating driving member (520) for driving the limiting frame (510) to rotate, the limiting frame (510) having two first limiting portions (511) arranged opposite to each other in the X-axis direction and two second limiting portions (512) arranged opposite to each other in the Y-axis direction, the positioning members (430) of the two X-axis positioning assemblies (400) having first limiting matching portions (436) matching with the two first limiting portions (511), and the positioning members (430) of the two Y-axis positioning assemblies (410) having second limiting matching portions (437) matching with the two second limiting portions (512); wherein, when the positioning member (430) of the X-axis positioning assembly (400) includes the fixed portion (431) and the folding portion (432), the first limiting matching portion (436) is provided on the fixed portion (431).

5. The current sensor appearance visual inspection machine according to claim 4, characterized in that: When the positioning member (430) of the X-axis positioning assembly (400) includes the fixed portion (431) and the folding portion (432), the limiting frame (510) further comprises a flip limiting portion (513) for limiting the maximum flip angle of the folding portion (432) of the positioning member (430).

6. The current sensor appearance visual inspection machine according to claim 1, characterized in that: Two storage boxes (600) are provided on the machine (100), and the two storage boxes (600) are respectively arranged at positions corresponding to the two discharge ports (130).

7. The current sensor appearance visual inspection machine according to claim 1, characterized in that: A rolling member (438) is provided at one end of the positioning member (430) close to the measuring platform (200) to reduce friction between the positioning member (430) and the current sensor (300) to be measured.

8. The current sensor appearance visual inspection machine according to claim 1, characterized in that: A positioning seat (140) is fixedly provided on the machine platform (100), a positioning shaft (439) is fixedly provided on the positioning member (430), and the positioning member (430) moves toward or away from the current sensor (300) to be measured through the positioning cooperation between the positioning shaft (439) and the positioning seat (140).

9. The current sensor appearance visual inspection machine according to claim 1, characterized in that: The measuring platform (200) comprises an upper platform (210) and a lower platform (220) arranged along the Z-axis direction, and a support frame (230) connected between the upper platform (210) and the lower platform (220); the image capturing device comprises a first camera (700) and a second camera (710) arranged along the Z-axis direction, wherein the upper platform (210) is made of a transparent or translucent material, the first camera (700) and the second camera (710) are located on both sides of the upper platform (210), and the second camera (710) is installed on the lower platform (220).

10. A method for detecting the appearance of a current sensor (300) using the current sensor appearance visual inspection machine according to any one of claims 1 to 9, characterized in that: The steps include: S100: placing the measuring platform (200) at a first height position, and placing the current sensor (300) to be measured on the measuring platform (200); S200: manually adjusting the position of the current sensor to be measured (300) so that it is in the position to be measured as much as possible; S300: moving the measuring platform (200) from a first height position to a second height position, and using positioning members (430) of four positioning assemblies to accurately position the current sensor (300) to be measured at a position to be measured; S400: moving the measuring platform (200) from the second height position back to the first height position; S500: Using an image capture device to perform photographic detection on the current sensor (300) on the measuring platform (200); S600: The current sensor (300) that has completed testing is removed from the measuring platform (200) and replaced with the next current sensor (300) to be tested for testing.

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